Gao Zeng, Chengju Ma, Xiaolong Huang, Ziyi Zhang, Dongning Li, Wei Fan, Juanni Li, Yang Wang
{"title":"Fabry-Perot interferometric humidity sensor based on PVA-GQDs composite film.","authors":"Gao Zeng, Chengju Ma, Xiaolong Huang, Ziyi Zhang, Dongning Li, Wei Fan, Juanni Li, Yang Wang","doi":"10.1364/AO.613590","DOIUrl":null,"url":null,"abstract":"<p><p>To develop compact and sensitive humidity sensors for environmental monitoring and industrial applications, a fiber-optic Fabry-Perot interferometric humidity sensor based on PVA-GQDs composite film is proposed. The device consists of two polished fiber ceramic ferrules assembled in a ceramic split sleeve, with a humidity-sensitive PVA or PVA-GQDs coating on one ferrule end face. Experimental results show that the PVA-GQDs sensor achieves sensitivities of -1.1174 and -1.8188 nm/%RH in the humidity ranges of 32%-50% RH and 50%-60% RH, respectively, which are higher than those of the pure PVA sensor. Moreover, it reduces temperature cross-sensitivity by 91.5% and exhibits a minimum standard error of 0.01655% RH. The proposed sensor provides a simple fabrication method, a compact structure, and a stable humidity response.</p>","PeriodicalId":101299,"journal":{"name":"Applied optics","volume":"65 29","pages":"10256-10264"},"PeriodicalIF":0.0000,"publicationDate":"2026-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied optics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1364/AO.613590","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/9/21 0:00:00","PubModel":"Epub","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
To develop compact and sensitive humidity sensors for environmental monitoring and industrial applications, a fiber-optic Fabry-Perot interferometric humidity sensor based on PVA-GQDs composite film is proposed. The device consists of two polished fiber ceramic ferrules assembled in a ceramic split sleeve, with a humidity-sensitive PVA or PVA-GQDs coating on one ferrule end face. Experimental results show that the PVA-GQDs sensor achieves sensitivities of -1.1174 and -1.8188 nm/%RH in the humidity ranges of 32%-50% RH and 50%-60% RH, respectively, which are higher than those of the pure PVA sensor. Moreover, it reduces temperature cross-sensitivity by 91.5% and exhibits a minimum standard error of 0.01655% RH. The proposed sensor provides a simple fabrication method, a compact structure, and a stable humidity response.
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